What is the meaning of “_”?

Encloses a quotation in some languages.

Encloses a quotation, title, ironic comment (scare quotes), nickname, gloss, or the mention of a word

Encloses a quotation.

Encloses an embedded (inner) quotation.

Encloses an embedded (inner) quotation.

Encloses a quotation.

Encloses a quotation.

Encloses an embedded (inner) quotation.

encloses an embedded (inner) quotation

Source: wiktionary.org